Determine nucleus of element having atomic no.& weight, Physics

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The nucleus of the element having atomic number 25 and atomic weight 55 will contain:

(1 )25 protons and 30 neutrons

(2) 25 neutrons and 30 protons

(3) 55 protons

(4) 55 neutrons

Ans:25 protons and 30 neutrons


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